Companies spend billions of dollars online for paid links to branded search terms. Measuring the effectiveness of this marketing spending is hard. Blake, Nosko and Tadelis (2015) ran an experiment with eBay, showing that when the company suspended paid search, most of the traffic still ended up...

Why do some nonprofits signal their respect for accountability via unilateral website disclosures? We develop an Accountability Index to examine the websites of 200 U.S. nonprofits ranked in the Chronicle of Philanthropy’s 2010 “Philanthropy 400.” Our intuition is that nonprofits recognize...

Since campaign contributions reveal the actor’s party leanings, they take place in a domain of social observation and are likely to be subject to social effects. We conducted a field experiment to identify some of these social effects. We sent letters to 92,000 contributors from all U.S....

The purpose of this study is to examine factors influencing U.S. charitable giving during the first full year of the Great Recession. Demand on the services of human service nonprofits typically escalates during periods of extreme economic downturn; thus donations to agencies serving the most...